From: David Teigland <teigland@redhat.com>
To: Winston Wen <wentao@uniontech.com>
Cc: lvm-devel@lists.linux.dev
Subject: Re: lvm2-monitor.servcie block boot process due to bad storage device
Date: Thu, 25 Apr 2024 12:02:44 -0500 [thread overview]
Message-ID: <ZiqMtOozvoNW2h-f@redhat.com> (raw)
In-Reply-To: <BA135FC1810D838F+20240423084101.40b9659c@winn-pc>
On Tue, Apr 23, 2024 at 08:41:01AM +0800, Winston Wen wrote:
> Hi,
>
> If a device's IO does not respond, it will block in the path of
> partition scanning. But at this point, it has already created the
> part0, like /dev/sda, in devtmpfs, but the mutex of the device has been
> held by the partition scanning code, so all processes attempting to
> open it will enter a wait.
>
> lvm scans and opens block devices under /dev/ during startup, so if
> there are any bad devices mentioned above, lvm2-monitor.server will be
> blocked, and because its type is oneshot, it will block the boot
> process, even if the poor device is not using lvm.
>
> May I ask if there is a way to avoid it? For example, can the
> type of this service be changed from oneshot to simple? Or is there
> any other better way?
I suggest using the devices file, or a filter (depending on your lvm
version) to prevent lvm from scanning devices other than PVs.
Dave
prev parent reply other threads:[~2024-04-25 17:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-23 0:41 lvm2-monitor.servcie block boot process due to bad storage device Winston Wen
2024-04-23 11:41 ` Zdenek Kabelac
2024-04-25 17:02 ` David Teigland [this message]
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